Rolocu is a Twist’n’Swap Puzzle Game. Charles Edge pointed me to this game via an email.

Object of Rolocu is to arrange these squares so that each row and each column has all nine colors in them. Double click a square to rotate a quarter turn or drag and drop one square onto another to swap places.

It looks a like Sudoku with colors. Only with Rolocu there are three online puzzle types available:
1. Twist Puzzle : All the squares are in the correct position but have been rotated.
2. Swap Puzzle : No rotations but squares have been swapped around.
3. Twist ‘n’ Swap Puzzle : Rotated and swapped